问Google API OAuth 2.0 CURL返回“缺少必需的参数: grant_type”
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Stack Overflow用户

提问于 2011-11-19 23:12:33

回答 6查看 13.2K关注 0票数 4

我正在尝试为一个web服务器应用程序实现谷歌的OAuth 2.0身份验证。

我可以从Google ok获取代码，但是当我发回这段代码并尝试获取访问令牌时，它总是给我一个错误“必需的参数缺失: grant_type。错误400”，即使grant_type在那里。

另外，如果我指定content-length为0以外的任何值，它还会抛出其他错误。

下面是执行这个curl post的代码：

$url = 'https://accounts.google.com/o/oauth2/token';
$ch = curl_init($url);

curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);  
curl_setopt($ch, CURLOPT_FAILONERROR, false);  
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($ch, CURLOPT_CUSTOMREQUEST, 'POST'); 

curl_setopt($ch, CURLOPT_HTTPHEADER, array(
    'Content-Type: application/x-www-form-urlencoded',
    'Content-length: 0'
));

curl_setopt($ch, CURLOPT_POSTFIELDS, array( 
    'code='. urlencode($code),
    'client_id=' . urlencode($clientID),
    'client_secret=' . urlencode($clientSecret),
    'redirect_uri=http%3A%2F%2Flocalhost%2Fexperiments%2FnewGALogin.php',
    'grant_type=authorization_code'
));

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回答 6

Stack Overflow用户

回答已采纳

发布于 2011-11-20 00:50:02

试一试

curl_setopt($ch, CURLOPT_POSTFIELDS, array( 
    'code' => $code,
    'client_id' => $clientID,
    'client_secret' => $clientSecret,
    'redirect_uri' => 'http%3A%2F%2Flocalhost%2Fexperiments%2FnewGALogin.php',
    'grant_type' => 'authorization_code'
));

或

curl_setopt($ch, CURLOPT_POSTFIELDS,
    'code=' . urlencode($code) . '&' .
    'client_id=' . urlencode($clientID) . '&' .
    'client_secret=' . urlencode($clientSecret) . '&' .
    'redirect_uri=http%3A%2F%2Flocalhost%2Fexperiments%2FnewGALogin.php' . '&' .
    'grant_type=authorization_code'
);

票数 7

Stack Overflow用户

发布于 2015-04-10 20:20:46

经过研究这个问题，似乎grant_type在数组格式中不被接受。(是的，查询字符串方法可以工作，但是构建起来很麻烦。)

如果您热衷于将POST字段保留在数组中，那么将http_build_query()添加到数组中是可行的。

curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query(array( 
    'code' => $code,
    'client_id' => $clientID,
    'client_secret' => $clientSecret,
    'redirect_uri' => 'http%3A%2F%2Flocalhost%2Fexperiments%2FnewGALogin.php',
    'grant_type' => 'authorization_code'
)));

票数 1

Stack Overflow用户

发布于 2016-01-05 21:48:58

我试图在这里提供的原始问题和答案中使用PHP代码，并不断收到来自Google token服务器的关于丢失的"grant_type“的投诉，尽管它肯定是被传入的。原来问题出在CURLOPT_HTTPHEADER不喜欢/不需要“Content-length:0”。希望这个完整的工作代码能让其他人避免同样令人头疼的事情。

// This is what Google's OAUTH server sends to you
$code = $_GET['code'];

// These come from your client_secret.json file
$clientID = "your client id.apps.googleusercontent.com";
$clientSecret = "your client secret";
$redirectURI = "your redirect URI";
$token_uri = 'https://accounts.google.com/o/oauth2/token';


$ch = curl_init($token_uri);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);  
curl_setopt($ch, CURLOPT_FAILONERROR, false);  
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($ch, CURLOPT_CUSTOMREQUEST, 'POST');

curl_setopt($ch, CURLOPT_HTTPHEADER, array(
    'Content-Type: application/x-www-form-urlencoded'
));

// Build the URLEncoded post data
$postFields = http_build_query(array( 
    'client_secret' => $clientSecret,
    'grant_type' => 'authorization_code',
    'redirect_uri' => $redirectURI,
    'client_id' => $clientID,
    'code' => $code
));
curl_setopt($ch, CURLOPT_POSTFIELDS, $postFields); 

$response = curl_exec($ch);

// Save response, especially the "refresh_token"
$pathToAccessToken = "/your/path/to/access_token.json";
file_put_contents($pathToAccessToken, $response);

仅供参考，响应JSON如下所示：

{
  "access_token" : "xxxWhateverGibberish", 
  "token_type" : "Bearer", 
  "expires_in" : 3600, 
  "refresh_token" : "yyyMoreGibberish" 
}

之后，我可以使用如下代码成功查询Calendar (我最初的OAuth请求调用的API作用域)：

function getClient() {
  $client = new Google_Client();
  $client->setApplicationName(APPLICATION_NAME);
  $client->setScopes(SCOPES);
  $client->setAuthConfigFile(CLIENT_SECRET_PATH);
  $client->setAccessType('offline');

  // Load previously authorized credentials from a file.
  $pathToAccessToken = "/your/path/to/access_token.json";
  $accessToken = file_get_contents($pathToAccessToken);
  $client->setAccessToken($accessToken);

  // Refresh the token if it's expired.
  if ($client->isAccessTokenExpired()) {
    $client->refreshToken($client->getRefreshToken());
    file_put_contents($pathToAccessToken, $client->getAccessToken());
  }

  return $client;
}

$client = getClient();
$service = new Google_Service_Calendar($client);

// Print the next 10 events on the user's calendar.
$calendarId = 'primary';
$optParams = array(
      'maxResults' => 10,
      'orderBy' => 'startTime',
      'singleEvents' => TRUE,
      'timeMin' => date('c'),
);
$results = $service->events->listEvents($calendarId, $optParams);

if (count($results->getItems()) == 0) {
    print "No upcoming events found.\n";
} else {
    print "Upcoming events:\n";
    foreach ($results->getItems() as $event) {
        $start = $event->start->dateTime;
        if (empty($start)) {
          $start = $event->start->date;
        }
        printf("%s (%s)\n", $event->getSummary(), $start);
    }
}